package cn.edu.mju.GlenDe.filters;

import java.io.IOException;
import java.net.URI;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

@WebFilter(urlPatterns = "/*")
public class PermissionFilter implements Filter {

	@Override
	public void destroy() {
		// TODO Auto-generated method stub

	}

	@Override
	public void doFilter(ServletRequest arg0, ServletResponse arg1,
			FilterChain arg2) throws IOException, ServletException {
		// TODO Auto-generated method stub
        String excludepath = "/GlenDe/login,/GlenDe/captche";
        HttpServletRequest request = (HttpServletRequest)arg0;
        String url = request.getRequestURI();
		if(url.indexOf("/admin")==-1)
		{
			arg2.doFilter(arg0, arg1);
		}
		else
		{
           if(excludepath.indexOf(url) > 0)
           {
            	arg2.doFilter(arg0, arg1);
           }else{
        	   HttpSession session = ((HttpServletRequest)arg0).getSession();
        	   Object obj = session.getAttribute("user");
        	   if(obj != null){
        	    	arg2.doFilter(arg0, arg1);
        	   }else{
        		arg0.getRequestDispatcher("../login").forward(arg0, arg1);
        	   }
            }
	    }
	}
	@Override
	public void init(FilterConfig arg0) throws ServletException {
		// TODO Auto-generated method stub

	}

}
